Let me start by saying this about your post

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sigh, ok I'll take these one by one
You start by saying this information is "plain wrong". Below is a link to an EPA study on how effective trees are in fighting air pollution. The scientists even took into account the BVOC's (nitrogen oxides, ozone, etc.) that you are so worried about. Their results indicate that air pollution in the area that they are studying would be reduced by 8%, and the small amount of chemicals trees give off naturally would be cancelled out by the benefits. Here's the link:
http://www.fs.fed.us/psw/programs/cufr/products/psw_cufr696_SacramentoAirQuality.pdf
Alas, in your world, the findings of the scientific community are probably wrong, when compared to your theory of aluminum siding.
I did try to find evidence of aluminum siding and bricks helping to reduce air pollution, but could not find any. Would you be kind enough to post some evidence of this breaking edge, scientific news? I'm not even sure how your theory would work. You see, trees are living organisms. Bricks and aluminum siding are not. Being a living organism, a tree sucks in and absorbs the pollutants, and also performs the added benefit of turning pollutants into amino acids. (My apologies if this is getting too sciencey for you). Aluminum siding and bricks are not living organisms and therefore cannot suck pollutants from the air. Maybe you are confusing air pollutants with everyday dust?
You stated in your ealier post that trees trap particulate matter, yes they do, like I said darn near everything traps particulate matter, have you ever had to clean your windows outside? Trees are not special in that regard
You state that heat is not a pollutant. No argument there. I never said it was, and either did the article. So, I don't know who you are debating that point with.
Erg, I'll go find your earlier post, maybe I misread it but I doubt it
Carbon monoxide, sulfur dioxide and nitrogen dioxide are naturally occurring.
So, what's your point?
My point was you called them pollutants in you earlier post!!! It doesn't make it any less toxic or deadly for humans to breathe in. Their levels have been rising because of industrialization. Are you suggesting that we should just ignore this because they are natural? Should urban areas stop issuing air quality alerts to people since these chemicals are natural? Of course not. We should try to reduce their levels so we have clean air to breathe. Of course, you are probably of the mindset that we should just ignore the problem since it's all natural. We can stand by as our atmosphere slowly chokes us to death, leaving behind a planet unsustainable to human life, except for the people that were smart enough to live in brick houses with aluminum siding. The other option would be cleaning the air of these natural toxins so that our children may be able to breathe.
Your statement makes no sense to me...we should try to eliminate naturally occurring gases in our atmosphere? That's absurd
As to sulfur dioxide, plants are not the major sources of its emission.

The burning of fossil fuels are.
wrong, plants, oceans and volcanoes are.
So, I guess in your anti-tree world, we should cut down all the forests and rain forests and build houses with aluminum siding in their place, as that is the most effective way to clean up our air. Right?!?!?
Trees in fact are an excellent aid in helping to clean the air that we breathe - much more effective then aluminum siding.
